I have my 2nd ribbon strand overnight. This time the strand is hooked around a small section of cedar (evergreen) branch that had broke off in a ice storm and was laying on the bottom. Same area, SE, sunny edge, same depth. The sun is feeling warm today so I'm sure water temps have come up yesterday and today against the brown/silty bottom with brown leaves covering it.

It seems the YP used the needles on the branch to help snag the eggs and pull them out as some of the egg strand is actually under the needles and some is draped over the top of the branch of needles.